Four North Korean planes "shadowed" the American plane over international waters for about 20 minutes before breaking off, he said.
Two North Korean MiG29 fighters and two other aircraft that Davis said appeared to be MiG23 fighters intercepted the Air Force RC-135S reconnaissance plane, which Davis said was conducting a routine intelligence mission over the Sea of Japan about 150 miles off North Korea (news - web sites)'s coast.

North Koreans targeting US Jets